27870401 has 4 divisors (see below), whose sum is σ = 30014292. Its totient is φ = 25726512.

The previous prime is 27870391. The next prime is 27870413. The reversal of 27870401 is 10407872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4840000 + 23030401 = 2200^2 + 4799^2 .

It is a cyclic number.

It is not a de Polignac number, because 27870401 - 2¹⁴ = 27854017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27870431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071926 + ... + 1071951.

It is an arithmetic number, because the mean of its divisors is an integer number (7503573).

Almost surely, 2^27870401 is an apocalyptic number.

It is an amenable number.

27870401 is a deficient number, since it is larger than the sum of its proper divisors (2143891).

27870401 is a wasteful number, since it uses less digits than its factorization.

27870401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143890.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 27870401 is about 5279.2424645966. The cubic root of 27870401 is about 303.1896738186.

The spelling of 27870401 in words is "twenty-seven million, eight hundred seventy thousand, four hundred one".